Use: This portable electric heating pad device is charged with USB, which is more convenient. It has three different adjustable temperatures and three different high-frequency vibration frequencies, you can choose the mode according to your needs. AUTOMATICDESIGN: The portable heating pad is designed to shut off automatically. If you fall asleep during use, our product will automatically shut down within 30 minutes after detecting that you have no movement to ensure your safety and health. If you wantto use it again, just turn it on again. Portable: small footprint, easy to carry, ready to use at any time. Note: This thermal pad can generate heat efficiently and quickly. So please select the lowest level for the first time use. More importantly,do not allow your skin to directly touch the device. Please place a cloth between the device and the skin. Application: You can use our products in different scenarios, whether you are resting, reading, driving or working, it will not affect you toomuch. Washable design, not easy to deform. 3 levels of temperature are adjustable, adjust as you like. Take care of your health, improve cold hands and feet, relieve menstrual pain. Packing list: upgrade model/hot compress + vibration + 1.5m extension cord + 2 packs of wormwood (simple color box) gray surface Shipping quantity: 1 set Package Contents: Only the above package content, other products are not included. Size: 103cm (Reminder: The size is measured manually, please allow 1-2cm measurement error) color: gray (Due to different monitors and lighting effects, the actual color of the product may be slightly different from the picture color.